Boilermaker&#39;s tool



Oct. 21, 1930. H. A. LACERDA 1,779,323

BOILER MAKER'S TOOL Filed July 1, 1927 INVENTOR fiDLZaaero M i ATTORNEY Patented Oct. 21,1930

UNITED :STATES HARRY ANTHONY LACERDA,

PATENT-OFFICE or wn'rnnvmn'r, NEW YORK BOILERMAKERS 'r ooL Application filed July 1,

A further object is the provision of a tool 1 V or fine pin of the character described which is adapted for use with a pneumatic hammer or like percussive power device to slmultaneously flare and set an end of a fluetube of a locomotive, and more particularly a tool provided with a detachable shank.

A further object of the invention is the provision of a clip for holding the tool or flue pin to the'end of an air hammer.

With the above and other objects in View;

the invention consists in certain constructions, arrangements and combinations of parts as will be hereinafter described and pointed out in the claims, reference being had to the accompanying drawing, in

Which Figure 1 is a sectional view of a portion of a conventional steam generator including a section of the fire-box flue sheet, and

' the smoke-chamber flue sheet, together with a plurality of the improved flue pins employed for seating the flues in the flue sheet;

Figure 2 is a sectional view showing a flue pin;

Figure 3 is a sectional view showing a clip for holding the flue pin to the end of an air hammer; and a Figure 4 is a transverse section on the line k4: of Figure 3.

Figure 1 shows a portion of a conventional steam generator to illustrate the operation of the improved implement, and'includes a 0 portion of the fire-box flue sheet at 10, a. portion of the smoke-chamber flue sheet at a 11, and a plurality of flues at 12, 13, 14 and 15.

Theflue 12 is shown disposed in the flue openings in the flue sheets as first inserted with the usual copper ferrule 16, before being rolled. The flue 13 is shown after being flared and set, and ready for the rolling. The flue 14 is shown after being rolled, and

1927. Serial in). 202,901;

the flue 15 issh owncompletely rolled and: processed. p p v 1 In the present application the flue pin comprises a stock or body enlarged intermediateits ends to provide an impact flange' bfi as indicated at 17, and adapted to be sub- 'ected to an impacting and a rolling force applied to the shank 1.8. I The head of the pin 19 shown in Figure 2 is provided with a central'cutout portion 20 to decrease the Weight without decreasing the efliciency'; said head is also provided with an axial socket 25 forthe reception of an end portion of the shanklS" of'the tool so that the shank 18 'is detachably engageable with' the head of the pin. The conical end 22 of the pin whichis truncated by the socket 25 formed therein merges with thej'flange 17 to constitute an impact portion and to reinforce the pin in'proximity to the socket. The toolshown in Figure 2 is esp eciallyadapted for 'use when the operator must manipulate the actuating pneumatic hammer in a space of restrictedarea, as in the space at the back of the steam pipes of'a locomotive where the hammer cannot be held securely squarewith the tool: The pin constitutes a driver-plung er by which the shank 18 is regarded as selfcontained, theprotruding end of the shank being insertable into the nozzle of an air' i hammer. I 1

In Figure 31 haveshown a slightly different pin 19 it having the flange 17 and the annular groove or channel in which seats one end of a spring clip 28 for holding the flue pin to the pneumatic hammer.

With a pin as above set forth the operation of setting and flaring the flue ends in the flue sheets is materially improved and the obviates any tendency to breakage, avoids abnormal straln upon the impacting and rotating element, for instance, a pneumatic hammer, as the resistance on the relatively short detachable shank 18 isfless than exerted on? the ordinary formed shank.

In practice'the flue to be set and flared at the smoke chamber end is held by a bucking-- up bar indicated at 26, from end movement againstthe'force of the air hammer or other danger of splitting the flues avoided it also impacting and. rotating device, a portion of which is indicated at 21, as disclosed in Patent 1,707,124, March 26, 1929, of Harry A. Lacerda. After the flues are set and rolled at the firechamber end they are flared and set at the smoke-chamber end by the same implement, as illustrated in Figure 1.

The clip 28 illustrated in Figure 3 is a spring-metal sleeve which flares at its mouth to slip over the head of the pin 19 it bein provided with the annular internal beads 28 and 28 which snap into annular grooves 17 and 27 of the pin 19 and the hammer 211espectively. These grooves are rolling in contour when viewed cross-sectionally, as in Fig; 3. In other words, the grooves and the ad joining high parts are gracefully rounded thus to enable an easy application of the clip 28 which is held none the less firmly because of the aforesaid cross-sectional contour.

What I claim is:

1. A boiler makers tool comprising a pin having a socket in one end and an annular flange reinforcing the pin in proximity to the socket and constituting an impact portion, and a detachable shank constituting a driverplunger self-contained by the pin, having one end partly inserted in the socket, the protruding end being insertable into the nozzle of an air hammer.

2. A boiler makers tool comprising a pin having a socket in one end, an annular flange merging with a cone which is truncated by the presence of the socket therein,'said cone and flange constituting an impact portion, and a shank having one end inserted into the socket.

A boiler makers tool comprising a pin having a socket in one end and an annular flange reinforcing the pin in. proximity to the socket and constituting an impact portion, a detachable shank constituting a driverplunger self-contained by the pin, having one end partly inserted in the socket, the protruding end being insertable into the nozzle of air hammer, and a clip applicable to the flange and to said nozzle to hold'the pin immovable against the nozzle.

4. The combination of a nozzle with a bore and a pin with a socket, a clip holding the nozzle and pin together so that the bore and socket communicate, annular grooves and flanges on the nozzle and pin being cross-sectionally of rolling contour in the axial d.irec tion, similarly shaped heads at the ends of the clip being applied to the grooves and flanges to hold the nozzle and pin relatively immovable, and a shank in the borehaving an extending end fitting the socket. v

HARRY ANTHONY LACERDA. 

